US4802740AExpiredUtility
Liquid crystal alignment layer containing polyvinyl-alcohol and titanium-alkoxide
Est. expiryFeb 13, 2005(expired)· nominal 20-yr term from priority
G02F 1/133711
61
PatentIndex Score
20
Cited by
13
References
7
Claims
Abstract
A liquid crystal device comprising an alignment-controlling film formed by applying an aqueous solution containing one part by weight of polyvinyl alcohol and 2 to 4 parts by weight of titanium alkoxide to a substrate surface, followed by heating.
Claims
exact text as granted — not AI-modifiedWhat we claim is:
1. A liquid crystal device, which comprises an alignment-controlling film formed by applying on a substrate a water solution comprising polyvinyl alcohol and titanium alkoxide, followed by heating, said titanium alkoxide being contained in a proportion of more than 2 parts by weight and not more than 4 parts by weight per part by weight of polyvinyl alcohol.
2. A liquid crystal device according to claim 1, wherein the polyvinyl alcohol has a degree of polymerization of 1,000 to 3,000.
3. A liquid crystal device according to claim 1, wherein the polyvinyl alcohol has a degree of saponification of 98 to 100%.
4. A liquid crystal device according to claim 1, wherein the polyvinyl alcohol is reactive polyvinyl alcohol having a functional group on a part of the main chain.
5. A liquid crystal device according to claim 4, wherein the functional group is a carboxyl group.
6. A liquid crystal device according to claim 1, wherein the titanium alkoxide is di-isopropoxy-bis(acetylacetonate)titanium, di-n-butoxy-bis-(triethanolaminate)titanium, or dihydroxy-bis-(lactato)titanium.
7. A liquid crystal device according to claim 1, wherein the alignment-controlling film has a thickness of 800 to 2,000 Å.Cited by (0)
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